4/5 is the answer.
The formula is y=mx+b, where m is the slope
We have

we have x is less than or equal 50/7
The value one unit of the bar model is 12
Step-by-step explanation:
The bar is divided into 8 units in the diagram (not available in this question)
We need to find the value of each unit
If x is value of 1 bar,
8x = 96
x = 96/8
So, x = 12
Hence the value one unit of the bar model is 12
Answer:$13.82
Step-by-step explanation:
$79.99+7.75%=$86.18
$100-$86.18=$13.82